The data select is working, because it updates the price and when added to basket it puts the right data in the basket. However the drop downs arent showing the right selected value when clicked. You will see this in an example on the link above. If try and select, say the 8th size option, its still will say the first. Same with the other drop down.

I have updated the theme just now and still has not resolved. I think the theme is the problem because when I activate the default twenty 12 theme the dropdown work fine. Its possible a Jquery issue somewhere.